Funny you mention the CJ 275,because my dear friend has just gotten that amp.He has all CJ ART components,and a fully loaded VPI table/arm/Lyra Titan-i cartridge,but the speaker is different from those mentioned here.
Thsy are highly modded Infinity RS-1bs.In truth(when modded "fully",including a crossover rebuild)these are about as revealing,and dynamic as anything "popular" today!Classic design.
The CJ 275 will only run the midbass/midrange/tweeter panels(the woofer towers are run by SS Krell).They'll start to come in at above 110 hz,or thereabouts.
Previously his sound,with the older CJ big boys has been superb,and he is an old school,extremely experienced 'phile!A great listening room as well....because.....
Regardless of what one thinks the particular sonic success of "any" system is the absolute combination of room/amp/speaker.....That's it,in a nutshell!!
They are not independant of oneanother!
He is currently experiencing some set-up problems,but I should be getting in some serious listening very soon.
Best